Prince Harry's plea for police protection for him and his family, while they are in the UK, has brought royal security into the spotlight.
Some high-ranking senior royals, including the likes of the Queen and the Duke and Duchess of Cambridge, are guarded by police protection officers around the clock.
While others, including the likes of Princess Anne, Prince Edward and Sophie Wessex, are only guarded by police protection officers while carrying out official duties and engagements.